Analysis of nitrogen heterocycles in shale oil by a dual capillary column heart cutting technique

Abstract The analysis of nitrogen heterocycles in a shale oil matrix is described. A dual column gas chromatograph is used for the analysis after a simple sample preparation scheme is used. Details of the apparatus, especially the inter-column pneumatic microswitch, are given. Quantitation by the standard addition method using internal volume corrections is described. Future direction for further development of this technique is briefly discussed.